Maria Johnston McCafferty

Looking for any available info her. She was born in 1812-13 butler or mercer Co Pa. Her parents were Nany Ann ( Ann) Best and James Johnston. She married William McCafferty in 1838 in butler or Mercer Pa. I find her in the 1900 census living with a son, her age is 87 she is mother of 5 living children and mother of 15 children.

I also do know Maria had several siblings but no clue as to their names. She maternal aunts Polly, jane and Sally and one uncle named Alexander. Any info appreciated yesca_L@Yahoo.com